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. 1 f. is made by C. L. Berger & So 158 Tacliymeter. With three Leveling Screws and Shifting <strong>Center</strong>. No. 1 f^ as in cut. Graduation of horizontal circle on solid silver, opposite verniers reading to 20'' ; graduation of 5 inch vertical arc on solid silver, verniers reading to minutes; glass shades over verniers ; detachable reading glasses for horizontal circle ; ll|-inch telescope showing objects inverted, power 27 diameters ; 6- inch spirit level parallel to telescope ; 3^ inch striding level ; gradienter attachment ; fixed stadia wires, etc. Standards leather-finished. Price, as above, $322.QO For size and particulars of this instrument, as well as for Extras see pages i5-i53- For adjustment of Transverse striding-level resting on special collars see page 5 6 - Code word Burdock.
No. 1 g. in. at edge of graduation.) 159 C. !L. BEBGER & SONS Tacliymeter. For size and particulars of tlie above instruments, as well as for extras, see pp. 15O-153. NO. 1 g", as in cut. Same as No. 1 f , but having a 5-inch full vertical circle with two double opposite verniers reading to minutes, and two reading-glasses to tJxe vertical circle. Code Word, Buttercup. Price as above, $352.OO
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ENGIN. LIBRARY UC-NRLF STANDARD INS
Page 9 and 10:
PREFACE. THE instruments enumerated
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DESCRIPTION OP THE Essential Featur
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Tangent Screws. These are made of A
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The Finish. It is a well-known fact
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11 whatever. As a rule more harm th
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13 has sufficiently developed to im
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15 ordinary instruments, but it mus
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17 frame, and apply another drop of
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19 The finer and finest classes of
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21 applied with an adjusting pin ab
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23 adjustment of the telescope in t
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25 Owing to the many improvements m
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27 Engineers 9 Instruments and Thei
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ITrfpodfead 2 // Bolt 3 // >/ Mf J
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In practice, however, many engineer
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34 The Pancratic, or Changeable Pow
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the 130 division, and moved on unti
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38 Graduation Reading to 2O". A 15
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Decimal Vernier Graduation. For rai
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HORIZONTAL CIRCLE HORIZONTAL CIRCLE
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44 line of collimation of the teles
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46 Obviously then, the number of wh
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48 Gradienter Screw Table I. Factor
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50 The subjoined table affords a re
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52 Plumbing and Centering Arrangeme
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54 To make the adjustment for Paral
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56 capstan-headed screw at left to
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58 To adjust the line of collimatio
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62 The Adjustment of the Wye Level.
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On slightly rising ground locate fo
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(5.) Astronomical Triangle. The hei
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68 From the -(- sign of the " diffe
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70 Degree of Precision Required. (1
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72 tions for refraction, using the
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74 Correction to the Mean Refractio
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76 Table H. Coefficients showing th
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78 To Find the Meridian from " Pola
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80 REMARKS. If the instrument is no
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82 These devices are being more and
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84 c. Directions. For finding the S
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6. Directions. For reducing the nor
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88 On Stadia Measurement. Written e
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90 included between this and the ot
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92 Jug, R, of the rod AB is the dif
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94 gent screw of the main telescope
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96 zero when plates are leveled up
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i I * 2 I! all 35 e 5c u fcc - = H
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100 Berger Short Focus Lenses. A se
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102 NOTE. In selecting instruments
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RIBBING PARTS OF INSTRUMENTS. Patro
Page 115: The Berber Complete Engineers' and
Page 119: [Patented) The Berber Complete Mine
Page 122 and 123: 11(5 5 O o to tO u tO CM in in in o
Page 124 and 125: 118 n ai in Spirit Levels. For the
Page 126 and 127: l, 33 120
Page 128 and 129: 122
Page 130 and 131: 14 124 C. L,. BEKGEK & SONS. BOSTON
Page 132 and 133: 1 5" AND 1 7|" C. t. BKKGER & SONS.
Page 134 and 135: C. 1-28 BEKGEU & SONS. Monitor Type
Page 136 and 137: 130 The Berger 18 MONITOR TYPE WYE
Page 138 and 139: 1 18 132 C. I*. BERGER & SONS, BOST
Page 140 and 141: 18 134 II ENGINEERS' WYE LEVEL. lev
Page 142 and 143: 136 18" HYDROGRAPHER'S WYE LEVEL Ha
Page 144 and 145: 138 Reversion Level. Applicable to
Page 146 and 147: 140 The Telescope will be invariabl
Page 148 and 149: 142 THE GEODETIC LEVEL. In response
Page 150 and 151: 144 COAST SURVEY PRECISE LEVEL The
Page 152 and 153: 146 PLANE TABLE This instrument, as
Page 154 and 155: 61" 150 ENGINEERS' AND SURVEYORS' T
Page 156 and 157: No. 1 a. 6 1 4 in. at edge of gradu
Page 158 and 159: No. I a. T 4 in. at edge of graduat
Page 160 and 161: No. 1 c. 154 C. L. BERGER & SO>S in
Page 162 and 163: No. 1 c, Style p. in. at edge of jr
Page 166 and 167: 160 C. L. BEKGEK & SONS. MONITOR TY
Page 168 and 169: 162 64 SURVEYORS' TRANSIT No. 1 s.
Page 170 and 171: 5^" 164 C. L. BERGER & SONS, BOSTON
Page 172 and 173: 166 C. L. BERGER & SONS. BOSTON 5|"
Page 174 and 175: 5|" 168 ENGINEERS' AND SURVEYORS' T
Page 176 and 177: The Surveyors' Solar Attachment. Pl
Page 178 and 179: 172 The Berger Solar Attachment Att
Page 180 and 181: 174 Davis' Patent Solar Attachment.
Page 182 and 183: 176 THE 5|" MOUNTAIN TRANSIT. This
Page 184 and 185: 178 The 41" Mountain and Mining: Tr
Page 186 and 187: 4|" 180 C. L,. BERGER & SONS. BOSTO
Page 188 and 189: 182 The 4" Mountain, Mining and Rec
Page 190 and 191: 184 The 4" Complete Transit- Theodo
Page 192 and 193: 186 4>4 " Complete Mine Transit No.
Page 194 and 195: ^ 188 t4 Mining Transits. All of th
Page 196 and 197: The 190 See M Fig. 1. Berger Patent
Page 198 and 199: 03 192 Complete Mining Transit No.
Page 200 and 201: |S go Complete Wet-Mine Transit No.
Page 202 and 203: 196 Different Types of Vertical Arc
Page 204 and 205: :i98 Edge G-racl nation for Vertica
Page 206 and 207: The Open-Frame Protected Vertical C
Page 208 and 209: 202 C. L. BEKGKK & SONS. Flexible J
Page 210 and 211: S fa 204 Style of trivets used with
Page 212 and 213: 200 Patented. The Lateral Adjuster
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Mining Transit. Interchangeable wit
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210 Tunnel Transits. Xo. 1C a Tunne
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212 Triaiigulatioii Transit- Theodo
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No. lib. 214 Complete Double Opposi
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210 No. 11 m. 7-iiich Complete Tran
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218 No. llg, 7-inch Complete Triang
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220 No. 12. 8-iiich Transit for Tri
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SPECIFICATIONS : No. 15 Alt-Azimuth
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No. 15 b. Alt.-Azimuth. 224 Alt. -A
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Portable Transit Instrument for Lat
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228 Reflecting Circle. Artificial H
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230 Current Meters, The types of cu
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232 Current Meters No. V and VI, As
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234 Plain Polar Plaiiimeter. This P
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236 Leveling Rods No. 145 No. 147 N
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Paine's Steel Tape Measures. & inch
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240 Surveyors' Chain Tapes. Heavy J
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2-12 Standard Steel Tape Measures.
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No. 210. Plummet Lamp. tfo. 212. 24
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246 Portable Anemometers. These ins
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PRICES SUBJECT TO CHANGE WITHOUT NO
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J Tripod Head 2 // Bolt 3 * .* Nut
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Levels, Locke's Hand Reversion Revo
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C. Li. Berger & Sons' Bevel-Limb Tr
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0) O (^ c CL 0? Z O (0 O K lu ffi C
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O CO K III III These prices do not
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ord (In whether . 4 O ~ bJD p,"* 3,
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a -iQ. Q u u o 0) o 0) U O U CO o C
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These prices do not include bag (SI
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Q III o o z o u o o U Ott bl CD O U
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o O (0 ui y O J O Q. O U 5> OC os .
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800290 I A 33012 Engineeringlibrary
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